Combined jack and drop.



No. 697,5l5. Patented Apr. l5, |902.

K. B. MILLER. y COMBINED JACK AND DRDP.

(Application filed Nnv. 8, 1901.)

UNITED STATES PATENT OEEICE.v

KEMPSTER B. MILLER, OF CHICAGO, ILLINOIS, ASSIGNOR TO KELLOGG SWITCHBOARD da SUPPLY COMPANY, OF CHICAGO, ILLINOIS, A COR- PORATION OF ILLINOIS.

COMBINED JACK AND DROP.

SPECIFICATION forming part of Letters Patent N o. 697,515, dated April 15, 1902. Application tiled November 8, 1901. Serial Nol 81,547. (No model.)

To all whom t may concern:

Be it known that I, KEMPSTER B. MILLER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in a Combined Jack and Drop, (Case No. 50,) of which the followingis a specification.

My invention relates to improvements in a combined jack and drop, and more partienlarly to the self-restoring type.

In the accompanying drawings, which illustrate this specification, Figure 1 is a side view of the combined drop and jack. Fig. 2 is a front View ofthe same. plan View of the device. Fig. 4 is aside elevation of the same, showing the jack, part in section and with the plug in position about to engage the contact-spring. Fig. 5 is a detail view showing the front part ofl the device in section and with the plug inserted. Fig. 6 is a rear elevation; and Fig. 7 is a cross-section on the line 7 7, Fig. 1, showing the relative positions of the side bars of the jack-frame.

In the gures the numeral 2 designates the shell of the magnet, which is secured at its inclosed end'to the rear face of a supportingplate 3, preferably brass, by means of a screw 4. (See Fig. 5.) The spool 5 or magnet-coil is located within this shell upon the core 6, which is secured to the shell 2 by means of a screw 7, the head of said screw being adapted to tit within a suitable aperture in the plate 3, and thus acting to steady the shell 2 and hold it in proper position. At the other end of the shell 2 the armature 8 is pivoted atits upper edge in a support 9, secured by screws 10 to the shell 2, and pivot-screws 11 extend through suitable lugs formed on the support 9 to engage the said armature. The shutterhook 12 is secured at its rear end to the upper edge of the armature 8 and extends forward to the drop 13. A notch 14 is provided in the supporting-plate 3 and a similar notch 15 in the insulating-plate Y16, secured to the front face of the plate 3, in which the forward end of the hook normally rests and is adapted to vibrate. The forward end of the hook is Fig. 3 is a bottom,

close the circuit of thenight-bell or pilotsignal when the drop falls, as shown in Fig. 4. The pin 17 is secured in position bythe drop-supporting plate 20, which is secured to the front face of the insulating-plate 16, but spaced away from the same slightly by the insulating-block 20a, the night-bell conductor 19 being supported near the front face of the plate 16.

The plates 3 and 16 extend below magnet 2 and carry the jack structure. Upon the rear face of plate 3 is secured a narrow insulatingplate 21. At the rear of this plate the jackframe is secured, and it is held in place by means of a sleeve 22, passing through the plates 3, 16, and 2l and threading into the `front bar 23 of the jack-frame, thus clamping the frame and bar 21 in position. The plate 3 is of course insulated from the sleeve 22, as shown. This frame comprises rearwardlyextending side pieces 24. 24, one above the level of the other, as shown in Fig. 7, which are connected at their rear ends by the horizontal portion 25, to the lower side of Which portion the springs 26 and 27 are secured. A strip of insulation 'is placed between the spring 26 and the portion 25 of the jack-frame and another between the two springs, While insulating-bushings surround the screws 28, which screws are adapted to firmly secure the said springs to the portion 25. The spring 26 is connected with the tip side of the line and at its forward end is provided with a bend 26, with which the tip 29 of the connectingplug is adapted to engage when the plug is inserted in the jack sleeve or ring 22. The free end of the spring extends forwardly through suitable apertures in the plates 3 and 16 and is bent upwardly at 26b in front of the device. A connecting-plug 30 isprovided with a sleeve-contact 31, which makes electrical contact with the sleeve 22 of the jack. Vtfhen the plug is inserted in the jack, the tip 20 thereof engages the spring 26 at the bend 2GL and lifts the same to cause the upwardlyextending portion 261 to strike the drop or shutter 13 and to restore the same to'normal position, as shown in Fig. 5. A strip of insulation 26 may be secured to the part 2Gb. The spring 2U has at its rear end a laterallydeflected portion 2G, Fig. 3, which connects with the binding-post 32 and terminal 33,with which thel tip side of the subscribers line is adapted to be connected. The lower spring 27, which normally engages with the spring 26, is extended at its rear end and is connected with a terminal 34, which makes contact with one ot the magnet-terminals 35, the other magnet-terminal 36 being connected by means of a small conductor 37 with the binding-post 38 and terminal 39,the latter also connecting with the jack-frame and through it with the sleev The plug-conductors are adapted to connect, respectively, with the tip 29 and sleeve 3l of the plug in the usual way.

The electrical circuits of the device may be traced from the tip-terminal 33 through the tip-spring 2G, local spring 27, conductor 3, magnet-terminal 35, through the magnetcoil and out through the terminal 36, conditetor 37, binding-post 33, and terminal 3f), by reason of which when a calling-current comes in over the line the magnet is operated to attract its armature 8, which lifts the Alever 12, thus permitting the drop or shutter 13 to fall. The operator upon seeing the signal or hearing the night-bell inserts the connecting-plug 30. The tip of the plug engages the spring 2G and lifts the same to restore the drop and to open the circuit through the local spring 27. The line-circuit is now extended through the tip-spring and tip-contact of the plug on one side and through the frame of the jack which corresponds to the sleeve side of the line and the sleeve-contact of the plug on the other side, and the magnet is cut out. At the termination of the conversation the plug may be withdrawn while the drop remains in its restored position.

By the terms frame and supportingstrip hereinafter used I mean to include any suitable part or combinations of parts that will accomplish the results sought.

yHaving described my invention, what I claim is- 1. In a combined jack and drop, a suitable frame, a sleeve mounted on the frame, a contact-spring carried by and insulated from the fraine and adapted to be engaged by the plug when it is inserted in the sleeve, and a drop, said spring being constructed and arranged to engage and restore the drop when the plug is inserted in the jack, substantially as described.

2. In a combined jack and drop, a suitable support, a contact-spring mounted upon and insulated from the support and forming a line-terminal of the jack, and a drop also mounted upon the support, said spring being formed to engage and restore the drop when a plug is inserted in the jack, substantially as described.

3. The combination with a suitable frame, of a tip-contact spring mounted thereon, a local spring with which said tip-spring normally engages, a drop-actuating magnet, the circuit of said magnet being normally completed through said springs, a drop, and a connecting-plug having a tipcontact adapted to engage the tip-spring to separate said springs and open the circuit through said magnet, said tip-spring being arranged to restore the drop upon the insertion ot' the plug, substantially as described.

4. In a combined jack and drop, the combination with a suitable supporting-framework, of adrop-actuating magnet and a drop carried thereon, a line-spring mounted upon and insulated from said framework and having a forwardly-extending end adapted to engage and restore the drop when a plug is inserted in the jack, a local spring also carried by and insulated from said framework, the said line-spring being adapted to normally engage said local spring and to thereby close the circuit through the said magnet, whereby when the plugis inserted in the jack the circuit through the magnetis opened and the drop restored by the line-spring, substantially as described.

5. The combination with a drop-actuating magnet and a drop, of a jack having a linespring and a local spring mounted upon and insulated from thejack structure,said springs being normally in engagement and serving to complete the line-circuit through the drop, said line-spring having an extended and upturned end to engage the drop when lifted, and a connecting-plug adapted to engage and lift said line-spring When inserted in the jack, whereby the drop is restored and the magnet cut out, substantially as described.

6. In a combined jack and drop, asuitable support, a contact-spring mounted upon and insulated from the support and forming alineterminal of the jack, said spring having a forwardly-extending and upturned end and a strip of insulation mounted upon said end, and a drop adapted to be engaged by said insulated upturned end and to be restored thereby when a plug is inserted in the jack, substantially as described.

7. In a combined jack and drop, the combination with a contact-spring forming one terminal of the jack, of a drop, and means actuated by said spring for restoring the drop When a plug is inserted in the jack, substantially as described.

8. In a combined jack and drop, the coinbination with a drop, of a contact-spring forming one terminal of the jack and having an extension to engagev and restore the drop when a plug is inserted in the jack, substantially as described.

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9. In a combined jack and drop, the combination with a drop, of acontact-spring forming one terminal of the jack, of a sleeve forming another terminal of the jack, said spring having au extension to engage andrestore said drop when a plug isinserted in the jack, substantially as described.

10. The combination with a. jack and drop structure having a drop, a contact -spring forming one terminal `of the jack, a sleeve forming another terminal of the jack, of a connecting-plug adapted to be inserted in the jack and having contacts to coperate respectively with the terminals of the jack, and means controlled by said spring to restore the drop upon the insertion of the plug into. the jack, substantially as described.

11. The combination with a jack and drop structure having a drop, a contact-.spring forming one terminal of the jack, a sleeve forming another terminal of the jack, and a connecting-plug adapted to be inserted in the jack and having contacts to coperate respectively with the terminals of the jack, said spring having an extension to engage and restore the drop when the plug is inserted in the jack, substantially as described.

12. A metallic-line drop and jack, comprising a framework, a sleeve mounted thereon, said framework and' sleeve being connected with one side of the metallic line, a contactspring mounted upon, but insulated from said framework and connected with the other side of the metallic line, anormal contact for the spring, a drop-actuating magnet having its winding connected on one side with said framework and the other withv said normal contact, a drop, saidspringhaving an extension, and means actuated by said extension for restoring the drop when a plug is inserted in the jack, substantially as described.

13. A metallic-line drop and jack, comprising a framework, a sleeve mounted thereon, said framework and sleeve being connected with one side of the metallic line, a contactspring mounted upon, but insulated from said framework and connectedwith the other side of the metallic line, a normal contact for the spring, a drop-actuating magnet having its winding connected on one side with said` framework and the other with said normal contact, and a drop, said spring having a forwardly-projecting end to engage and restore the drop when a plug is inserted in the jack, substantially as described.

14. In a combined jack and drop, the combination with a front plate, ofa drop mounted upon said plate, and a contact-spring forming one terminal of the jack, said spring being extended through an aperture in said front plate to engage said drop and restore the same when a plug is inserted in the jack, substantially as described.

15. In a combined jack and drop, the combination with a front plate, of a drop mounted upon said plate, and a contact-spring forming one terminal of` the jack, said spring being extended through an aperture in said front plate and having an upturned end to engage and restore the drop when a plug is inserted in the jack, substantially as described.

16. In a combined jack and drop, the combination with a front plate, of a drop mounted upon said plate, and a contact-spring forming one terminal of the jack, said spring being extended through an aperture in saidfrent plate and having an upturned end to engage and restore the drop when a plug is inserted in the jack, said forward and upturned end having an insulating-covering,`substantiallyv as described. y

17. In a combinedjack and drop', the combination with a front plate or support having a jack-socket therein and anaperture above the socket, of a j ack-frame secured tothe rearV `front and rear bars joining them, the said frontbar being placed against the rear face of the supporting-strip, a` sleeve extending through the said supporting-strip and front bar to secure the said frame to the strip, said sleeve forming the jackopening,.a contactspring forming one terminal of the Vjack mounted upon and insulated from said rear bar and having a contact portion disposed in line with said sleeve, the forward end of said spring being extended over said sleeve, and a 'dropadapted to 4be restored Yby said extended end when a plug is-insertedin the jack, substantially as described. l

19. In a combined drop and jack, thel combinationwith a support, of a drop pivoted upon the face of said support, a drop-actuating magnet secured to the rear face of said support, a j ack-frame also secured to the rear face of the support,a sleeve extending through the support and into said frame and forming a terminal of the jack, and a contact-spring mounted upon and insulated from said frame and forming the other terminal of the jack, said spring being extended forward over the sleeve and through the support to engage and restore the drop when a plug is inserted in the sleeve, substantially as described.

Signed by me, at Chicago, county of Cook, State of Illinois, this 4th day of November, 1901.

Y KEMPSTER B. MILLER. lVitnesses:

ROBERT LEWIS AMES, JOSEPH C. BELDEN.

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